Pressure-regulator



(No Model.)

G. HARRIS. PRESSURE REGULATOR.

amwwhoz Jae -Patented Sept. 20, 1892.

E flkfozmm UNITED STATES PATENT OFFICE.

GEORGE HARRIS, OF CHICAGO, ILLINOIS.

PRESSURE-REGULATOR.

SPECIFICATION forming part of Letters Patent No. 482,842, datedSeptember 20, 1892.

Application filed March 21, 1891.

To all whom it may concern:

Be it known that I, GEORGE HARRIS, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented a new and useful Gas-Pressure Regulator, of which the followingis a speci fication.

My invention relates to that class of gas pressure regulators which areparticularly adapted to use in regulating the supply of gas togas-engines in substitution for the rubber bag, which is the source ofmuch annoyance and which in practice fails to perfectly perform the dutyassigned to it.

My objects are to not only perfectly supply a given pressure of gas to agas-engine, so that an explosive mixture of known and invariableproportions can be continuously made, but also prevent the gas-pressurein the supply-pipes from being materially effected by the intermittentdrafts of gas required in all gas-engines, and these objects Iaccomplish by the means illustrated in the accompanying drawings, inwhich-- Figure l is a vertical sectional view of a gas-holder, showingthe several operative parts comprising my invention. Fig. 2 is asectional view of a part of the side of the gas-holder and two rings,together with a piece of flexible material composing the diaphragm, toshow how the diaphragm is secured to the gas-holder to prevent leakage.Fig. 3 is a sectional view of holder on line a b of Fig. l.

Similar letters refer to like parts throughout the several views.

The casing Ais a cylinder having a bottom A, secured permanently inposition. At the top is a lid B, having a handle a. The rim B of the lidprojects downward all around casing Aat (1. Inside casing A, near thetop, is a ring 0, which is smaller in diameter than casing A, and thering has a bottom part which turns outwardly and joins the casing A ate, where it is firmly attached and forms an annular space 0 all aroundthe inside of the casing to contain a sealing fluid. There is a cylinderE, which has a closed top D and handles D, which cylinder is larger indiameter than ring 0 and smaller in diameter than the inside of casing Aand placed in position, as shown, with the lower Serial No. 385,912. (Nomodel.)

edge of its rim immersed in the sealing-fluid in space 0', thuspermitting the cylinder E to rise and fall without any gas escaping intothe space under lid B should aslight leak occur in the diaphragm F. Thisdiaphragm is circular in shape and made of a flexible ma terial, and itsperiphery is attached around the inside of case A by means of two rings.The lower ring G is permanently attached to case A and has a positionunder diaphragm F, and the upper ring H is held at the top of thediaphragm by means of a series of bolts f, which pass up through bothrings and the diaphragm, Fig. 2. Secured to the center of the bottom Aof easing A is a valve-casing I, which is provided with a screw-threadedopening gfor the admission of gas from a pipe. (Not shown.) There isalso an opening at the bottom of valve-casing I, into which is screwed astop-plug 9. There is an opening at the top of the valve-casing, intowhich is secured the lower end of a vertical pipe J, which projectsupward into the inside of the gas-chamber K and terminates inareducingcoupling h. Pipe J projects down into the valve-casing I, andits end forms a seat for a valve 71, which valve is secured to the lowerend of a rod j, which passes upward through the center of pipe J andthrough the small part of reducing-coupling h, which serves as a guide,thence upward, its upper part being attached by means of two broadflanges 7c and Z, gas-tight to the center of diaphragm F. The top of rodj projects above the diaphragm and serves to hold in position weights jfor increasing or decreasing the gas-pressure in the gas-chamber K.

On each side of the centerof length of pipe J is an oblong orifice m,Fig. 3, which forms a communication from the inside of pipe J to theinside of gas-chamber K. There are two pipes L and M for the exit ofgas, and these pipes are secured to the bottom A of case A, and eachhave theirend projecting below bot tom A for the attachment of pipes forcarrying gas to the place where it is consumed.

In operation, when the apparatus contains no gas, the valve t' restsupon the top of plug g at'the bottom of valve-casing I, which supportsthe weight of valve-rod j, diaphragm F, and the pressure-regulatingweights 3'. If when the parts are in this position gas isadmitted from apipe through orifice g ofvalve case I, it will have free passage pastvalve 1' and up through pipe J and out into the gaschamber K, and thencedownward into and through pipes L and M to the place of consumption, thegas continuing to flow until the pipes connected to L and M are filledand the pressure is gradually raised in gas-chamber K, which acting inall directions presses upward upon diaphragm F,lifting its centralportion, together with the weights j, rod j, and valve 11 until valve'11 contacts with the lower end of pipe J, which cuts off a furthersupply of gas to chamber K. It new gas is turned on at an engine or forilluminating purposes, the pressure is lowered in gas-chamber K, and aconsequent descent of diaphragm F and an opening of valve i an exactamount to supply the demand at whatever pressure is within the limits ofthe pressure of the supply to the valve-casing I, the pressure in gaschamber K being in proportion as a greater or less number of weights jare placed upon the top of diaphragm F.

The flexible material of which it is usual to make diaphragms by longuse is liable to leak gas, and to prevent any loss of this kind thecylinder E has been specially added to this apparatus and acts inconjunction with the diapragm, rising and falling with the increase anddecrease of pressure in the gaschamber, and, this action having atendency to condense or rarefy the air in the spacebetween top of lid Band top D of cylinder E, small holes are made at d in the top of the lidfor permitting the air to pass into and out of said space withoutobstruction.

I claim as my invention- In a gas-pressure regulator, thecombination,with a casing provided with a cover and having an inlet-pipeprovided with a valveseat and outlet-opening, of two rings secured tothe interior thereof, the upper one of which is smaller in diameter thanthe casing and has its bottom turned outwardly and secured to the casingand forms with said casing an annular space for the reception of aliquid and the lower ringis provided with bolt-holes, acylindricalclosed top cover within the upper ring, a loose ring provided withbolt-holes to correspond with the holes of the lower ring, a flexiblediaphragm between the two perforated rings, bolts through the perforatedrings for securing the diaphragm and the rings together, and a rodsecured to the diaphragm having a valve at its lower end and weightsupon its upper end on top of the diaphragm, substantially as set forth.

GEORGE HARRIS. Witnesses:

F. L. BARNETT,

J. J. SMITH.

